Hi,
I already replied to your contact request by email on that same question.
For everyone interested, here was my answer:
You need to:
- Change the option "registration" of the Checkout tab of the configuration to "no registration" and the option "login" to "no" on that same screen.
- Go in the menu Display->Custom fields and unpublish all the fields except the "telephone" one.
That's it.
If you want to change the text in the emails of HikaShop, you can use translation overrides:
www.hikashop.com/en/download/languages.html#modify